Milk permeate as a dietary supplement for lactating dairy cows

1990 ◽  
Vol 30 (6) ◽  
pp. 807
Author(s):  
RT Cowan ◽  
PC Upton ◽  
A Reid
Keyword(s):  
Dairy Cows ◽  
Dietary Supplement ◽  
Milk Fat ◽  
Dry Matter ◽  
Dry Matter Intake ◽  
Fat Percentage ◽  
Lactating Dairy Cows ◽  
Ad Libitum ◽  
Milk Permeate ◽  
Sorghum Grain

Milk permeate was evaluated as a supplement to replace part of the concentrate or roughage in the diet of lactating dairy cows. The basal d i e t was 6 kg cracked sorghum grain and 6 kg ryegrass dry matter, and permeate was offered ad libitum in place of either 3 kg of sorghum or 3 kg of ryegrass. Intake of permeate stabilised at 30 kg/cow.day (1.7 kg DM) after 6 weeks, with considerable variation among replicate groups. Milk fat percentage was increased from 3.8 to 4.5% (P<0.05) when permeate replaced grain in the diet. Where permeate replaced pasture there was apparently large variation among cows in permeate intake, and this was associated with large variation in the fat and protein contents of the milk. Milk yield (volume) was reduced in proportion to the reduction in total dry matter intake (r = -0.99). With high intakes of permeate, the C18:0 acids in milk fat were reduced and the C16:0 acids increased. It was concluded that permeate could replace about 1.7 kg grain in the diet and that, at this level, there would be advantages in milk fat percentage.

EFFECT OF ABRUPTLY ADDING BUFFERS TO THE RATIONS OF LACTATING DAIRY COWS

1985 ◽  
Vol 65 (2) ◽  
pp. 521-523 ◽  
Author(s):  
ELLIOT BLOCK ◽  
L. D. MULLER
Keyword(s):  
Sodium Bicarbonate ◽  
Dairy Cows ◽  
Magnesium Oxide ◽  
Milk Fat ◽  
Dry Matter ◽  
Rumen Fluid ◽  
Dry Matter Intake ◽  
Milk Fat Depression ◽  
Lactating Cows ◽  
Lactating Dairy Cows

Feeding 0.23 kg of sodium bicarbonate plus 0.07 kg of magnesium oxide per day to cows with a milk fat depression tended to reduce dry matter intake temporarily. Milk production declined by 1.2 kg/day, milk fat increased by 0.43%, and rumen fluid pH increased as a result of buffer additions. There was also a trend toward higher blood alkaline indices. Key words: Buffers, lactating cows, sodium bicarbonate, magnesium oxide, milk fat depression

Effect of stage of lactation and feeding level on milk yield response by stall-fed dairy cows to change in pasture intake

1990 ◽  
Vol 30 (4) ◽  
pp. 495 ◽  
Author(s):  
C Grainger
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Milk Fat ◽  
Dry Matter ◽  
Dry Matter Intake ◽  
Early Lactation ◽  
Feeding Level ◽  
Stage Of Lactation ◽  
Ad Libitum ◽  
Ad Libitum Intake

Three separate experiments were carried out to determine the effects of stage of lactation and feeding level on marginal production response by dairy cows to change in feeding level. In each experiment cows were individually offered cut pasture in stalls, ad libitum initially for 10 days, and for a further 28-day period when feeding treatments were imposed. In experiment 1, a total of 37 cows in early or late lactation were offered the same high quality pasture diet either ad libitum or at 0.60 x ad libitum intake. In experiments 2 and 3, 35 and 31 cows which were in early (experiment 2) or late lactation (experiment 3) were offered pasture at 1 of 3 feeding levels: ad libitum, 0.75 x ad libitum. 0.50 x ad libitum intake. In experiment 1 the marginal response was similar, 23.5 and 25.0 g milk fat/kg change in dry matter intake, for cows offered the same diet in early or late lactation. In experiment 2, cows in early lactation showed marginal responses which ranged from 0 to 80 g milk fat/kg dry matter intake and were greater at lower feeding levels and for cows with greater initial milk production. In experiment 3, the marginal response for cows in late lactation was similar to that in experiment 1 (24.4 g milk fat/kg change in DM intake) and was not significantly affected by the level of feeding or by the initial milk production of the cow. Reduced levels of feeding in late lactation appeared to accelerate the changes in milk composition which occur normally in late lactation: increases in the concentration of milk fat and protein; a decrease in lactose concentration. It is concluded that in early lactation, much of the published variation in marginal response can be explained by differences between experiments in levels of feeding studied and in the initial milk yield of the cows. In late lactation there was much less variation in the reported magnitude of the marginal response, and the variation which did exist can be explained by experimental error.

PSIV-12 Effects of feeding a novel alfalfa leaf pellet product (ProLEAF MAX™) and alfalfa stems (ProFiber Plus™) on production of lactating dairy cows

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 294-294
Author(s):  
Laura A Smith ◽  
Allen Y Young ◽  
Chris Pratt ◽  
Kara J Thornton
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Milk Fat ◽  
Dry Matter ◽  
The Other ◽  
Dry Matter Intake ◽  
Lactating Dairy Cows ◽  
Alfalfa Hay ◽  
Milk Components ◽  
Alfalfa Leaf

Abstract Alfalfa is a commonly grown forage in the Intermountain west and is often included in lactating dairy cow rations. This study investigated the effects of including novel alfalfa products: ProLEAF MAX™ (PLM), an alfalfa leaf pellet; and ProFiber Plus™ (PFP), alfalfa stems, in the diet of lactating dairy cows on dry matter intake, milk yield, and milk components. Holstein cows were housed in a freestall barn and milked in a free-flow automatic milking system. All cows were fed each treatment for 21-days, then switched to the next treatment utilizing a crossover experimental design. The five treatments were: control (CON, typical diet including alfalfa hay; n = 65); low-quality alfalfa hay (LQ+PLM, a diet that replaced alfalfa hay with low-quality alfalfa hay and PLM; n = 62); PLM+PFP (a diet that replaced alfalfa hay with PLM and PFP; n = 65); PLM (a diet that replaced alfalfa hay with PLM; n = 62); and PFP (a diet that replaced alfalfa hay with PFP; n = 60). Cows were group fed a partial mixed ration balanced for 40.8 kg milk, 3.9% milk fat and 3.3% milk protein. Individual milk yield and milk components were recorded daily by the automatic milking system. Dry matter intake was also recorded daily. When fed the PFP diet, cows had decreased (P &lt; 0.01) dry matter intake compared to the other diets. Milk yield was increased (P &lt; 0.01) when cows received the PLM diet when compared to the other diets. When fed the PFP and PLM+PFP diets, milk fat was increased (P &lt; 0.01) when compared to the other diets. Milk protein was decreased (P &lt; 0.01) when cows were fed the PFP diet when compared to the other diets. These data indicate that inclusion of fractionated alfalfa products in the diet of lactating dairy cows has the potential to increase milk yield and milk components.

scholarly journals Predicting Daily Dry Matter Intake Using Feed Intake of First Two Hours after Feeding in Mid and Late Lactation Dairy Cows with Fed Ration Three Times Per Day

Animals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 104
Author(s):  
Shulin Liang ◽  
Chaoqun Wu ◽  
Wenchao Peng ◽  
Jian-Xin Liu ◽  
Hui-Zeng Sun
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Dry Matter ◽  
Prediction Equation ◽  
Dry Matter Intake ◽  
Validation Dataset ◽  
Nutrient Requirements ◽  
Independent Dataset ◽  
Lactating Dairy Cows ◽  
Proposed Model

The objective of this study was to evaluate the feasibility of using the dry matter intake of first 2 h after feeding (DMI-2h), body weight (BW), and milk yield to estimate daily DMI in mid and late lactating dairy cows with fed ration three times per day. Our dataset included 2840 individual observations from 76 cows enrolled in two studies, of which 2259 observations served as development dataset (DDS) from 54 cows and 581 observations acted as the validation dataset (VDS) from 22 cows. The descriptive statistics of these variables were 26.0 ± 2.77 kg/day (mean ± standard deviation) of DMI, 14.9 ± 3.68 kg/day of DMI-2h, 35.0 ± 5.48 kg/day of milk yield, and 636 ± 82.6 kg/day of BW in DDS and 23.2 ± 4.72 kg/day of DMI, 12.6 ± 4.08 kg/day of DMI-2h, 30.4 ± 5.85 kg/day of milk yield, and 597 ± 63.7 kg/day of BW in VDS, respectively. A multiple regression analysis was conducted using the REG procedure of SAS to develop the forecasting models for DMI. The proposed prediction equation was: DMI (kg/day) = 8.499 + 0.2725 × DMI-2h (kg/day) + 0.2132 × Milk yield (kg/day) + 0.0095 × BW (kg/day) (R2 = 0.46, mean bias = 0 kg/day, RMSPE = 1.26 kg/day). Moreover, when compared with the prediction equation for DMI in Nutrient Requirements of Dairy Cattle (2001) using the independent dataset (VDS), our proposed model shows higher R2 (0.22 vs. 0.07) and smaller mean bias (−0.10 vs. 1.52 kg/day) and RMSPE (1.77 vs. 2.34 kg/day). Overall, we constructed a feasible forecasting model with better precision and accuracy in predicting daily DMI of dairy cows in mid and late lactation when fed ration three times per day.

The effect of compound composition and silage characteristics on silage intake, feeding behaviour, production of milk and live-weight change in lactating dairy cows

1991 ◽  
Vol 52 (1) ◽  
pp. 11-19 ◽  
Author(s):  
D. A. Jackson ◽  
C. L. Johnson ◽  
J. M. Forbes
Keyword(s):  
Dairy Cows ◽  
Weight Change ◽  
Milk Fat ◽  
Feeding Behaviour ◽  
Dry Matter ◽  
Live Weight ◽  
Productive Performance ◽  
Lactating Dairy Cows ◽  
Principal Energy ◽  
Friesian Cows

ABSTRACTAn experiment was carried out to investigate the effects of compound composition and silage characteristics on silage intake, feeding behaviour and productive performance of dairy cows during the first 25 weeks of lactation. Over a period of 3 years, 36 lactating British Friesian cows (12 per year), in their third or later lactations, were divided into two groups. The cows in each group received either compound S, in which the principal energy source was cereal starch, or compound F containing a mixture of high quality digestible fibre. Cows given compound F ate 2·2 kg more silage dry matter per day (P < 0·05). The type of compound had no effect on the frequency of silage feeding and the time spent eating was significantly different only over weeks 10 to 25 of lactation (P < 0·05), with cows on compound F spending on average 20 min longer feeding per day. Cows on compound F produced 1·7 kg more milk per day than cows on compound S. Although there were no significant differences in the concentration of milk constituents, compound F was associated with higher yields of milk constituents. Significant differences were found between the years of experiment in the frequency of feeding (P < 0·05) and also in the concentration of milk protein and milk fat. There were no significant differences in the magnitude of live-weight change between treatments or year of experiment.

scholarly journals Effect of Heat Stress on Bacterial Composition and Metabolism in the Rumen of Lactating Dairy Cows

Animals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 925
Author(s):  
Zhao ◽  
Min ◽  
Zheng ◽  
Wang
Keyword(s):  
Heat Stress ◽  
Dairy Cows ◽  
Milk Production ◽  
Dry Matter ◽  
16S Rrna Genes ◽  
Dry Matter Intake ◽  
Rrna Genes ◽  
Bacterial Composition ◽  
Rumen Ph ◽  
Lactating Dairy Cows

Heat stress negatively impacts the health and milk production of dairy cows, and ruminal microbial populations play an important role in dairy cattle’s milk production. Currently there are no available studies that investigate heat stress-associated changes in the rumen microbiome of lactating dairy cattle. Improved understanding of the link between heat stress and the ruminal microbiome may be beneficial in developing strategies for relieving the influence of heat stress on ruminants by manipulating ruminal microbial composition. In this study, we investigated the ruminal bacterial composition and metabolites in heat stressed and non-heat stressed dairy cows. Eighteen lactating dairy cows were divided into two treatment groups, one with heat stress and one without heat stress. Dry matter intake was measured and rumen fluid from all cows in both groups was collected. The bacterial 16S rRNA genes in the ruminal fluid were sequenced, and the rumen pH and the lactate and acetate of the bacterial metabolites were quantified. Heat stress was associated with significantly decreased dry matter intake and milk production. Rumen pH and rumen acetate concentrations were significantly decreased in the heat stressed group, while ruminal lactate concentration increased. The influence of heat stress on the microbial bacterial community structure was minor. However, heat stress was associated with an increase in lactate producing bacteria (e.g., Streptococcus and unclassified Enterobacteriaceae), and with an increase in Ruminobacter, Treponema, and unclassified Bacteroidaceae, all of which utilize soluble carbohydrates as an energy source. The relative abundance of acetate-producing bacterium Acetobacter decreased during heat stress. We concluded that heat stress is associated with changes in ruminal bacterial composition and metabolites, with more lactate and less acetate-producing species in the population, which potentially negatively affects milk production.

The effect of ammoniated and roasted barley on rumen pH, milk yield and milk composition of lactating dairy cows

2003 ◽  
Vol 2003 ◽  
pp. 107-107
Author(s):  
M. H. Fathi ◽  
A. Nikkhah
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Milk Fat ◽  
Dry Matter ◽  
Metabolic Disorders ◽  
Milk Composition ◽  
Barley Grain ◽  
Nutrient Requirements ◽  
Rumen Ph ◽  
Lactating Dairy Cows

Cereal grains can provide the major source of energy in diets in order to meet the nutrient requirements of high producing dairy cows. However the amount of starch that can be included in the diets of dairy cows is limited particularly if starch is rapidly fermented such as barley starch. Reduction of feed intake, rumen pH, milk fat test, microbial growth and other metabolic disorders are expected if ruminally degradable starch is fed in amount that cant be efficiently metabolized by rumen microbs. Various techniques for processing barley grain have been developed to decrease the degradability of dry matter in rumen without reducing its extent of digestion. McNiven (1995) showed roasting of barley is more effective treatment. The objective of this experiment was to study of effects the roasting and ammoniation of barley grain on rumen pH, feces pH, milk yield and milk composition in dairy cows.

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